POPULATION CYTOGENETICS I. MEIOTIC STUDIES ON PHALARIS MINOR RETZ. FROM HARYANA AND ADJOINING SHIWALIK HILLS

Meiotic studies were performed on seven populations of Phalaris minor from Haryana and adjoining Shiwalik Hills. All the presently worked out populations are tetraploid (2n=28) with X-7. The meiotic course in all the populations is found to be abnormal with few quadrivalents, besides normal bivalents, stickiness in chromosomes, presence of secondary association of Some bivalents, non-synchronous separation of some bivalents at Metaphase-l, cytomixis, presence of bridges and laggards during anaphases and telophases, etc. in spite of normal microsporogenesis, high incidence of pollen sterility is found in different populations.